Engine cooling device of an amphibian service car

ABSTRACT

An engine cooling device of an amphibian service car which has a cooler provided outside of the engine room in a sealed structure containing an engine and a radiator, a hatch provided at the engine room, a conduit connected from the water manifold of the engine to the high temperature side of the cooler, anotherconduit connected from the low temperature side of the cooler to the high temperature side of the radiator, and another conduit connected from the low temperature side of the radiator to the water jacket of the engine. Thus, the engine of the service car is cooled by the radiator on land and by the cooler underwater, without fail.

e United States Patent [1 1 11 1 3,763,953 Yoda et a1. Oct. 9, 1973 [54] ENGINE COOLING DEVICE OF AN 1,313,620 8/1919 Cammen 123/41.08 AMPHIBIAN SERVICE CAR 2,032,876 3/1936 l-laltenberger 180/68 R 2,960,315 11/1960 HuffmamJr. et a1.... l23/4l.5l Inventors: Tadlshl Yoda, y s Kiichi 2,320,889 6/1943 Rowan 123/4151 Muraki; Masatoshi Kishilani, both of Hlrakata an of Japan Primary Examiner-Kenneth H. Betts [73] Assignee: Kabushiki Kaisha Komatsu Assistant Examiner-David M. Mitchell Seisakusho, Tokyo, Japan Attorney-James E. Armstrong et al. 221 Filed: Nov. 5, 1971 [211 App]. No.: 196,148 ABSTRACT An engine cooling device of an amphibian service car [30] Foreign Application p u' which has a cooler provided outside of the engine Nov 6 1970 Japan 45/972) room in a sealed structure containing an engine anda 970 Japan 45/9721] radiator, a hatch provided at the engine room, a conduit connected from the water manifold of the engine [52] CL 180/68 R 115/1 123/41 51 to the high temperature sideof the cooler, another- ,1 180/ 180/54 conduit connected from the low temperature side of [51] II" B60k 11/00 the cooler to the high temperature side of the radiator, [53] Fieid A 68 1 and another conduit connected from the low tempera- 115/1 4] 08 1 ture side of the radiator to the water jacket of the en- I gine. Thus, the engine of the service car is cooled by [56] References Cited the radiatoron land and by the cooler underwater,

UNITED STATES PATENTS 2,397,792 4/1946 Kramer et al. 115/1 R 3 Claims, 5 Drawing Figures PATENTED BET 9 I973 sum i or 3 INVENTOR.

,. ru um This invention relates to an engine cooling device of an amphibian servicecar.

It is an object of this invention to provide an engine cooling device of an amphibian service car which may cool theengine both on land and underwater, without fail.

According to one aspect of this invention, there is provided an engine cooling device of an amphibian service car which comprises a cooler provided outside of the engine room and wherein the engine room is a sealed structure containing an engine and a radiator, a hatch provided on the engine room, a conduit connected from the water manifold of the engine to the high temperature side of the cooler, another conduit connected from the low temperature side of the cooler to the high temperature side of the radiator and another conduit connected from thelow temperature side of the radiator to the water jacket of the engine.

These and other objects, features, and advantages of this invention will become apparent from the following description taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a longitudinal side view partly in section of the cooling device of an amphibian service car of this invention; I

FIG. 2 is a front view partly in section of the cooling device;

FIG. 3 is a longitudinal sectional view of the cooler of the cooling device of this invention;

FIG. 4 is a sectional view of the cooler taken along the line lV-IV 111 FIG. 3; and

FIG. 5 is a sectional view of the cooler taken along the line VV in FIG. 3.

Reference is now made to the drawings, particularly to FIGS. 1 and 2, which show one embodiment of the cooling device of an amphibian service car of this invention.

Reference numeral 1 illustrates an engine room in the form of a sealed structure which has an engine 2 and a radiator 3 therein. A cover 4 is fixed to the front wall la of the engine room 1, and a plurality of holes 5 for permitting free fluid flow are formed at the front surface 40 of the cover 4. A cooler 6 is rests on the bottom surface 4b of the cover 4. A conduit 7 conected to the water manifold of the engine a water-tight manner through the front wall 1a of the engine room 1, and the other end of the conduit 7 is connected to the high temperature side of the cooler 6. The conduit 8 connected to the low temperature side of the cooler 6 passes in water-tight manner through wall 1a into the engine room 1, and the other end of the conduit 8 is connected to the tank 3a of the radiator 3. The low temperature side of the radiator 3 is. connected through a conduit 9 and a water pump to the water jacket of the engine. A hatch 10 is provided at the upper wall 1b of the engine room I.

In the operation of the thus constructed engine cooling device of the underwater service car, if the hatch l0 isclosed so as to seal theengine room 1 and the service car is placed under water, water passes through the cover 4 from the holes 5 of the cover 4 so as to reduce the temperature of cooler 6. For this reason, the coolant water fed out of the water manifold of the engine 2 enters through the conduit 7 into the cooler 6 where the coolant water is cooled, and is then fed through the conduit 8, radiator 3, and conduit 9 into the water jacket of the engine 2 so as to cool the engine. In this case, the radiator 3 does not have a heat dissipatin function but acts only as a circulating path.

When the service car operates on land, the hatch10 is opened so that the outer atmospheric air is fed into the engine room 1 to impart a heat dissipating function to the radiator. In this case, the circulating path of the coolant water is the same as that of the operation of the 'service car underwater.

It should be understood from the foregoing description that since the cooling device of the service car is so constructed as to have a cooler provided outside of the engine room which is a sealed structure containing an engine and a radiator, a hatch provided at the engine room, a conduit connected from the water manifold of the engine to the high temperature side of the cooler, another conduit connected from the low temperature side of the cooler to the high temperature side of the radiator, and another conduit from the low temperature side of the radiator to the water jacket of the engine, the coolant water of the engine is cooled by the cooler in operation underwater and by the radiator in operation on land of the service car so as to cool the engine regardless of the operation on land or under water, without fail.

Reference in now made to FIGS. 3 to 5, which show the detail of the structure of the cooler used in this cooling device of the service car.

The cooler 6 has a frame 11 opened at the front, rear and lower sides, and a lower case 13 is mounted through a resilient plate 12 inside both lower ends of the frame 11. This lower case 13 is opened only at the upper surface thereof, and a cover 14 is fixed by bolts 15 at the opening of the lower case 13, and the lower case is constructed in a sealed condition. An upper case 16 is fixed in contact with the opening of the upper surface of the frame 11 at the upper portion of the frame 11, and the upper case 16 is constructed in a sealed condition. A connecting port 17 is provided at the upper case 16 and a connecting port 18 is provided at the lower case 13. A plurality of through holes 19 and 20 are formed at the upper surface 1 1a of the frame 11 and the cover 14, and a number of cooling pipes 21 are mounted at the upper ends thereof through the holes 19 at the upper surface 11a of the frame 11, and are mounted at the lower ends thereof through the holes 20 at the cover 14 so that the cooling pipes 21 are supported by the supporting plate 22. The conduit 7 is connected to the connecting port 17 and the conduit 8 is connected to the connecting port 18.

In the operation of the thus constructed engine cooling device of the underwater service car, if the hatch 10 is closed to seal the engine room l and the service car is set underwater, water passes through the cover 4 from the holes 5 of the cover 4 so as to cool the cooler 6. Therefore, the coolant water fed out through the water manifold of the engine 2 enters through the conduit 7 into the upper case 16 where the coolant water is cooled upon passing down through the cooling pipes 21 to enter the lower case 13, and is fed through the conduit 8, radiator 3, and conduit 9 into the water jacket of the engine 2 so as to cool the engine. In this case, the radiator 3 does not have a heat dissipating function but acts only as a circulating path similar to the previous case.

lt should also be understood from the foregoing description that the cooling device of the service car is so constructed as to have a cooler with a case fixed outside of the engine room and the engine room is a sealed structure containing an engine for conveying water in and out, an upper case into which coolant water fed from the water manifold of the engine is conveyed, a lower case communicated with the water jacket of the engine, and a plurality of cooling pipes passing through both the upper and lower cases, the cooling pipes of the cooler contact the water which flows into the case to be cooled so as to cool the coolant water flowing down through the cooling pipes. Accordingly the engine is effectively cooled.

The present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The presently disclosed embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

What is claimed is:

1. An engine cooling device of an amphibian service car comprising a cooler with high temperature and low temperature sides provided outside of the engine room and wherein said engine room is a sealed structure containing an engine and a radiator with high temperature and low temperature sides, a hatch provided on the engine room structure, a first conduit connected from a water manifold of the engine to the high temperature side of said cooler, a second conduit connected from the low temperature side of said cooler to the high temperature side of the radiator, and a third conduit connected from the low temperature side of the radiator to a water jacket of the engine.

2. An engine cooling device of an amphibian service car as set forth in claim 1, wherein said cooler comprises a case fixed outside of the engine room sealed structure for conveying water, wherein said case com,- prises an upper case into which coolant water fed from the water manifold of the engine flows, and a lower case communicated with the waterjacket of the engine, and a plurality of cooling pipes connecting said upper and lower cases. I

3. An engine cooling device of an amphibian service car as set forth in claim 1, wherein said cooler comprises a frame opened at the front, with rear and lower sides, and a lower case mounted through a resilient plate inside both the lower ends of said frame. 

1. An engine cooling device of an amphibian service car comprising a cooler with high temperature and low temperature sides provided outside of the engine room and wherein said engine room is a sealed structure containing an engine and a radiator with high temperature and low temperature sides, a hatch provided on the engine room structure, a first conduit connected from a water manifold of the engine to the high temperature side of said cooler, a second conduit connected from the low temperature side of said cooler to the high temperature side of the radiator, and a third conduit connected from the low temperature side of the radiator to a water jacket of the engine.
 2. An engine cooling device of an amphibian service car as set forth in claim 1, wherein said cooler comprises a case fixed outside of the engine room sealed structure for conveying water, wherein said case comprises an upper case into which coolant water fed from the water manifold of the engine flows, and a lower case communicated with the water jacket of the engine, and a plurality of cooling pipes connecting said upper and lower cases.
 3. An engine cooling device of an amphibian service car as set forth in claim 1, wherein said cooler comprises a frame opened at the front, with rear and lower sides, and a lower case mounted through a resilient plate inside both the lower ends of said frame. 